Combined time and percussion fuse.



H. PRAHL'.

COMBINED TIME AND PERCUSSION FUSE.

APPLICATION FILED FEB- 11. 1915.

1, 144,242. Patented June 22, 1915.

Fig.7.

Mm ESSES mar/446% STAKE ti/ ill.

HUGO PBAHL, 0F DUSSELIDORF, GERMANY, ASSIG-NOR TO RHEINISCI-IE METALL-WAABEN- UND IVIASCHINENFABRIK, OF DUSSELDQRF-DERENDORF, GERMANY,

A CORPORATION OF GERMANY.

COMBIN D TIME- AND rnncussron rusn.

Specification of Letters Patent.

Patented June 22, 19175:.

Application filed February 17, 1915. Serial No. 8,862.

To all whom it m my concern:

the following. to be a full,'clear-,1and exact v description of theinventiom-"such es will enable others slrilled'in the art toiwhich itappertainsto make and use the same- My invention relates to improvementsin combined time and percussion fuses of the kind in which the detent ofthe firing pin is effected by unlocking a rocking-arm by.

means of the time or by means of the percussion device. According to myinvention I arrange on this rocking arm a double armed lever abuttingwith one of its arms against a boltrotated by means of the time fusingdevice and with its other arm against a bolt protruding during theimpact of the projectile so that the lever steps aside and releases therocking arm if the bolt influenced by the time fusing device is turnedand also if the other bolt protrudes during the im act. By thearrangement in the said doub e armed lever the conditions of frictionaremore favorable than if the detent arm is locked directly by both bolts.

influenced by the time fusing device and by the impact respectively.

An embodiment of my invention is shown in the accompanying drawing inwhich Figure 1 is a longitudinal section and Fig. 2 a cross sectionthrough the combined fuse.

In the represented combined fuse there is for time and impact actiononly one primer bolt 9 pressed by a spring p with an inclined surface dagainst a correspondingly inclined projection 0 of the fuse frame. vInconsequence of this arrangement the primer bolt gis adapted whenunlocked to turn under the influence of the inclined faces rcssedtogether,' and by such rotation the recess a of the bolt (Fig. 2) isbrought un der the projection c whereupon the primer I bolt 9 with itsprimer is thrown against the needle 6.

In its normal position the primer bolt 9- is prevented from bein turnedby the following arrangement. n the primer bolt 9 a rock arm 2' isfastened and provided with a small double armed lever Z pivotallymounted on the rock arm 2', one arm of the said double armed lever 3abutting against a flattened; portion .of a bolt j and the other armabutting against a bolt 0. The bolt 7' is'connected in any well knownman" ner with a time fusing device of any known construction in such amanner, that the flattened portion of the bolt 3' is turned away fromthe lever Z sometime after firing, the said time being adjusted in anordinary way by the timing device. As soon as the flattened portion ofthe bolt j releases the small lever Z the rock arm 5 is free to beturned by the sp'ring p and the inclined surfaces of d and 0 so that theprimer bolt 9 is thrown against the needle e in the aforesaid manner. II

If the shell is to be exploded by impact the bolt 0 protrudes in themoment of impact whereby the abutting arm of the lever Z is freed sothat the rock lever i is again rotated under the influence of the springand of the inclined surfaces. The primer is then thrown by the spring 7against the protrude on the impact of the shell, the said 7 leverabutting with its both arms against the said bolts'respectively.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

HUGO PRAHL. [.L. s.] Witnesses HELEN Nurture, ALBERT Nurse.

